With Desktop Command Execution Widget for Nokia N900 we can see on the desktop the result of a custom shell command. Very useful if you use it, for example, with lshal, awk or wget.

To display an accurate percentage number of battery level we can type:
hal-device | grep percen | awk ‘{print $3″%”}’
Another example, shows the percentage of root partition:
df /|tail -1|tr -s ” “|cut -d ” ” -f 5
Desktop Command Execution Widget (desktop-cmd-exec) is available in the Extras-Devel repository. To learn more about repositories, click here.
More info | maemo.org.

Nice appl but still bugy. If you put some DCE options on your desktop you will have some problems with tapping from time to time. Then you have to reboot.